Pointing a domain to your server public IP

1. Ngnix ready

2. Edit "A" record of your domain and point it to your public IP address.
Host : @
Points to : 52.65.138.1
TTL : 1 Hour

3. Nameservers remains defult.

4. Ngnix server block point your public IP:
    server {
        listen       8081;
        server_name  52.65.138.1;

5. Go! mydomail.com:8081 => Test ok!

Next step:

SRV (godaddy DNS):

Type : SRV
Service : _http
Protocol: _tcp
Name : e1.life110volts.com
Priority: 0
Weight : 0
Target : @
Prot : 8081
TTL : 1 Hour